Low-alkali and low-calcium comprehensive utilization method of high-clay copper-molybdenum sulfide ore

Abstract

The invention belongs to the technical field of mineral flotation, and particularly relates to a low-alkali low-calcium comprehensive utilization method for high-clay copper-molybdenum sulfide ores, which comprises the following steps: replacing lime with part of sodium hydroxide, reducing calcium ions in ore pulp from the source, complexing calcium ions in alkaline ore pulp by using a novel high-entropy dispersing agent and a combined dispersing agent in a low-alkali ore pulp environment, and reducing the content of calcium ions in the alkaline ore pulp. The problem of copper-molybdenum metal loss caused by the fact that ore pulp floccules wrap monomer copper-molybdenum minerals under the high-alkali condition is solved, efficient enrichment of copper and molybdenum under the low-alkali medium is achieved, and the molybdenum-copper ratio of the flotation concentrate is greatly increased compared with that of conventional copper-molybdenum mixed flotation concentrate. In addition, according to the method, the dispersion effect of the copper-molybdenum flotation tailings is good, comprehensive recycling of kaolin is achieved, the resource utilization rate is increased, the discharge amount of fine-grain tailings is reduced, and favorable conditions are provided for forming an effective dry beach in a tailings pond.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral processing, and more specifically to a low-alkali and low-calcium comprehensive utilization method of high-clay copper-molybdenum sulfide ore. Background Art

[0002] Copper is a national strategic metal, with widespread applications across traditional industries, emerging technologies, national defense, military, and resource security. Its strategic value lies in its comprehensive support for the economy, energy, science, and technology, as well as national security. However, my country's dependence on foreign copper resources exceeds 70%, with imports primarily coming from countries like Chile, Peru, and Mongolia. With the development of large-scale copper mines in Tibet and other regions, the separation process faces challenges such as complex ore intercalation, interference from argillaceous minerals, and poor selectivity of flotation reagents.

[0003] The Yulong Copper Mine in Tibet is a large-scale porphyry copper mine. Continuous mining and changes in rock strata distribution have resulted in a diverse mineralogy and complex inter-mineral intercalation. The ore's copper minerals primarily consist of chalcopyrite and chalcocite, while the molybdenum mineral is molybdenite. Gangue minerals primarily consist of quartz, clay minerals, and feldspar. Clay minerals, including kaolinite, montmorillonite, illite, and sericite, account for over 25% of the total mineral content, making it a low-sulfur copper ore (S grade approximately 1.5%). The original process employed a mixed flotation process consisting of one coarse, two scavengers, and three refiners under high-alkaline conditions (pH > 12.5), using up to 6,000 g / t of lime. In this high-alkaline flotation system, lime is the primary factor causing pulp flocculence. Higher lime usage increases pulp viscosity and increases flocculence, which traps copper and molybdenum minerals, leading to loss of individual copper and molybdenum minerals in the tailings. The cause of slurry flocculence is the negative surface charge of clay minerals. Calcium ions, as divalent cations, compress the double layer, neutralizing the surface charge, leading to particle flocculation and altering the slurry's rheological properties. Furthermore, the high-alkali lime process uses a large amount of lime inhibitor, causing the flotation slurry pH to exceed 13. This not only causes sticky foam but also negatively impacts pipeline scaling and tailings sedimentation (unclassified coarse and fine particles). Consequently, the tailings pond cannot effectively dry out, posing a safety hazard.

[0004] As is well known, the core problem of the difficulty in controlling argillaceous clay minerals such as kaolinite, montmorillonite, illite, and sericite lies in their high natural floatability, easy mudification, and severe flocculation under high-alkaline conditions. This problem needs to be solved through the development of new dispersants, process optimization, and precise control of the slurry environment. There is little research on the directional dispersion of clay minerals such as kaolinite, montmorillonite, illite, and sericite in high-clay copper-molybdenum ores. Especially in traditional lime-high-alkaline systems, the more severe the slurry floccules, the more likely they are to entrain copper and molybdenum minerals, affecting their recovery.

[0005] Based on this, developing efficient dispersants for copper-molybdenum sulfide ores with high clay minerals, optimizing copper-molybdenum flotation reagent systems and processes, and reducing the flotation reagent costs of such ores have important research significance and application value. Summary of the Invention

[0006] The purpose of the present invention is to overcome the difficulties of existing copper sulfide ore flotation, such as poor dispersion inhibition of muddy gangue, serious copper-molybdenum mutual inclusion, serious flocculence under high alkaline conditions, and difficulty in tailings sedimentation. A new flotation inhibitor for copper sulfide molybdenum ore containing high clay minerals is invented, and comprehensive recovery of clay minerals such as kaolin is achieved, thereby improving resource utilization and reducing tailings discharge. Combined with breakthroughs in flotation reagents and processes, the present invention achieves efficient enrichment of copper sulfide ore in a low-alkalinity slurry environment, and the reagents used are green and environmentally friendly, the separation process is simple, and the sorting indicators are good.

[0007] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions: A low-alkali and low-calcium comprehensive utilization method for high-clay copper-molybdenum sulfide ore, comprising the following steps: S1: Grinding and slurry adjustment: Add 500~700g / t of adjusting agent into the ball mill, grind the ore, control the grinding fineness of the first stage -0.074mm to account for 60~65%, and adjust the slurry pH value to 9.50~10.0; S2: Copper, molybdenum and other flotation: add the raw ore pulp obtained in S1 to the flotation machine, and add 200-300 g / ton of high entropy dispersant, 30-50 g / ton of collector and 15-25 g / ton of frother in sequence to carry out the copper, molybdenum and other flotation roughing operation; the copper, molybdenum and other flotation roughing foam is subjected to a first equal floatation blank selection operation to obtain high-molybdenum and low-copper concentrate, and the equal floatation selection tailings and copper, molybdenum and other flotation roughing tailings are combined to form equal floatation tailings; S3: Copper and molybdenum enhanced flotation: add 300-500g / t of adjusting agent to the floatable tailings obtained in S2, adjust the pH value of the pulp to 10.80-11.30, and then add 100-300g / ton of high entropy dispersant, 50-80g / ton of collector and 20-30g / ton of frother to carry out an enhanced copper roughing operation to obtain enhanced copper roughing foam and enhanced copper rough tailings. Add 15-30g / ton of collector and 10-15g / ton of frother to the enhanced copper rough tailings for sweeping. The scavenging operation obtains scavenging concentrate and scavenging tailings. The scavenging tailings are copper-molybdenum flotation tailings. 50-100 g / t of inhibitor is added to the enhanced copper roughing foam to carry out the Concentration I operation to obtain Concentration I foam and Concentration I tailings. The Concentration I tailings are mixed with the scavenging concentrate and returned to the enhanced copper roughing operation to form a closed loop. 40-60 g / t of inhibitor is added to the Concentration I foam to carry out the Concentration II operation to obtain high-copper and low-molybdenum concentrate and Concentration II tailings. The Concentration II tailings are returned to the Concentration I operation to form a closed loop. S4 desulfurization and desliming - magnetic separation to recover kaolin: add 300~600g / t of activator to the copper-molybdenum flotation tailings obtained in S3, adjust the pH value of the pulp to 9.50~10.00, and then add 30~60g / ton of butyl xanthate and 20~30g / ton of frother in sequence for flotation desulfurization to obtain sulfur concentrate and desulfurization tailings; the desulfurization tailings are classified by multi-stage cyclone to obtain -0.010mm ore slime, and the yield is controlled at 15~20%; the ore slime is deironed by superconducting magnetic separation to obtain kaolin concentrate and magnetic tailings.

[0008] Furthermore, the adjusting agent described in S1 and S3 is one of sodium hydroxide and calcium oxide or a mixture of the two, and the mass ratio of the mixture of the two is 1:2~1:3.

[0009] Furthermore, the high entropy dispersant in S2 and S3 is a mixture of polymaleic acid, polyaspartic acid, carboxymethyl cellulose and sodium humate, which is prepared by a solution blending method and modified in an ethanol solution.

[0010] Furthermore, the collector in S2 is a composite collector formed by methyl mercaptobenzoate and diesel, the preparation ratio of which is 1:1 to 4:1, and the foaming agent is MIBC or pine oil.

[0011] Furthermore, the collector described in S3 is a composite collector composed of any two of 5-hydroxyoctane-4-one oxime, thiazolidinedione, and Y89 xanthate, and the preparation ratio thereof is 1:1 or 1:2; the inhibitor is a composite inhibitor composed of water glass and carboxymethyl cellulose, and the preparation ratio thereof is 1:1~5:1.

[0012] Furthermore, the flotation desulfurization operation activator in S4 is oxalic acid or sulfuric acid, and the foaming agent is MIBC or pine oil.

[0013] Furthermore, in the superconducting magnetic separation operation described in S4, the slurry concentration is 15~20%, and the magnetic field strength is 3.0~5.0T.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention forms a high-entropy dispersant by using polymaleic acid, polyaspartic acid, carboxymethyl cellulose and sodium humate. The working principle of the dispersant is as follows: first, polymaleic acid and polyaspartic acid molecules contain a large number of carboxyl groups, which can react with calcium and magnesium ions on the surface of gangue minerals to form a chelate reaction, thereby enhancing the hydrophobicity of the gangue minerals; second, this type of dispersant will dissociate ions in the slurry, so that the surface of the muddy gangue minerals adsorbed by the dispersant is uniformly charged, and the slurry dispersion is stabilized by the repulsive effect between the charges. Through these two effects, the floatability of the muddy gangue can be reduced, and the hydrophobicity difference between the copper sulfide molybdenum ore and the gangue can be expanded, creating favorable conditions for subsequent sorting.

[0015] (2) The high entropy dispersant of the present invention can not only replace part of the lime, forming polyhydroxyl hydrophilic groups in the slurry solution to selectively adsorb on the surface of the mud gangue minerals, but also reduce the Ca2+ that causes slurry flocculants from the source. 2+ The concentration is reduced, the colloidal effect of clay minerals is reduced, the inhibition efficiency is indirectly enhanced, and the high-selectivity copper-molybdenum sulfide collector is used to achieve rapid and preferential enrichment of molybdenum, which is beneficial to the subsequent efficient separation of copper and molybdenum. In addition, the dispersant reduces the effect of calcium ions on pulp flocs, reduces the entrapment of copper-molybdenum minerals by muddy minerals, and eliminates the disadvantages of traditional high-alkali lime process on tailings sedimentation.

[0016] (3) The method of the present invention successfully achieves the comprehensive recovery of clay minerals such as kaolin from copper-molybdenum flotation tailings, effectively reducing the scale of tailings storage. At the same time, it provides an innovative solution and technical ideas for the flotation separation of high-argillaceous copper ores such as porphyry and skarn types, which have strict environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the process flow of Examples 1 to 4 of the present invention; Figure 2 The macroscopic morphology of flotation tailings slurry sedimentation under different dispersant dosages in Examples 1 to 3 and Comparative Example 1 is shown. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to specific examples. The examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. The experimental methods used in the following examples are conventional methods unless otherwise specified; the materials and reagents used are commercially available reagents and materials unless otherwise specified.

[0019] This example uses a high-clay sulfide copper-molybdenum deposit in Tibet, my country, as an example. The main useful minerals are molybdenite, chalcopyrite, chalcocite-blue chalcocite, covellite, bornite, and pyrite. Clay minerals such as kaolinite, montmorillonite, illite, and sericite account for over 25% of the total content. Other gangue minerals are primarily quartz and feldspar. The original ore has a Cu grade of 0.76%, a Mo grade of 0.034%, a S grade of 1.60%, an Al₂O₃ grade of 15.30%, and a Fe₂O₃ grade of 4.28%.

[0020] Example 1 Schematic diagram of flotation separation process of high muddy copper-molybdenum sulfide ore Figure 1 As shown, the specific process is: S1 Grinding and Slurry Adjustment: Add 700g / t of the adjusting agent into the ball mill, grind the ore, control the grinding fineness to -0.074mm, accounting for 60%, and adjust the slurry pH to 10.0; S2 copper, molybdenum, etc. can be floated: According to the flotation reagent system in Table 1, the corresponding reagents were added to the slurry of S1 to obtain a high-molybdenum, low-copper concentrate with a Mo grade of 2.68%, a Cu grade of 16.50%, and molybdenum and copper recoveries of 81.67% and 22.23% respectively; S3 copper-molybdenum enhanced flotation: According to the flotation reagent system in Table 1, the pulp pH was adjusted to 10.8, and the corresponding reagents were added to the floatable tailings of S2. High-copper, low-molybdenum concentrate and tailings were obtained by flotation. The high-copper, low-molybdenum concentrate was obtained with a Cu grade of 21.16% and a Mo grade of 0.10%. The copper and molybdenum recoveries were 64.49% and 6.89%, respectively. S4 desulfurization and desliming - magnetic separation to recover kaolin: S3 copper-molybdenum flotation tailings were flotation-desulfurized according to the flotation reagent system in Table 1. The pH of the slurry was adjusted to 9.5, and the slurry was classified by multi-stage cyclone flow to obtain sludge (yield 15%). The sludge was subjected to superconducting magnetic separation (slurry concentration 15%, magnetic field intensity 3.0T) to obtain kaolin concentrate with a yield of 17.20%, an Al2O3 grade of 27.15%, an Fe2O3 grade of 0.20%, and a brightness of 75.

[0021] Example 2 The ore sample used in this example is the same as that in Example 1. The specific copper-molybdenum beneficiation process is the same as that in Example 1, except that the reagents and their dosages used in steps S2 and S3 are shown in Table 1, the first-stage grinding fineness -0.074 mm accounts for 65% respectively, the pulp pH is 9.90, the pulp pH is adjusted to 11 in S3, the pulp pH is adjusted to 9.8 in S4, the superconducting magnetic separation pulp concentration is 18%, and the superconducting magnetic separation magnetic field intensity is 4.0 T; finally, a high-molybdenum, low-copper concentrate with a Mo grade of 2.82% and a Cu grade of 15.03% was obtained, and the molybdenum and copper recoveries were 82.31% and 20.66% respectively; a high-copper, low-molybdenum concentrate with a Cu grade of 20.30%, a Mo grade of 0.098%, and copper and molybdenum recoveries were 65.82% and 6.75% respectively; a kaolin concentrate with a yield of 15.03%, an Al2O3 grade of 28.24%, a Fe2O3 grade of 0.18%, and a whiteness of 78 was obtained.

[0022] Example 3 The ore sample used in this example is the same as that in Example 1. The specific copper-molybdenum beneficiation process is the same as that in Example 1, except that the reagents and their dosages used in steps S2 and S3 are shown in Table 1, the first grinding fineness of -0.074 mm accounts for 60% respectively, the pulp pH is 9.80, the pulp pH is adjusted to 11.3 in S3, the pulp pH is adjusted to 10 in S4, the superconducting magnetic separation pulp concentration is 20%, and the superconducting magnetic separation magnetic field strength is 4.5 T; finally, a high-molybdenum, low-copper concentrate with a Mo grade of 3.05% and a Cu grade of 15.15% is obtained, and the molybdenum and copper recoveries are 82.17% and 19.44% respectively; a high-copper, low-molybdenum concentrate with a Cu grade of 19.82% and a Mo grade of 0.11% is obtained, and the copper and molybdenum recoveries are 67.02% and 7.81% respectively; a kaolin concentrate with a yield of 15.57%, an Al2O3 grade of 28.07%, a Fe2O3 grade of 0.17%, and a whiteness of 80 is obtained.

[0023] Example 4 The ore sample used in this example is the same as that in Example 1. The specific copper-molybdenum beneficiation process is the same as that in Example 1, except that the reagents and their dosages used in steps S2 and S3 are shown in Table 1, the first-stage fineness of -0.074 mm accounts for 63% respectively, the slurry pH is 9.5, the slurry pH is adjusted to 11 in S3, the slurry pH is adjusted to 10 in S4, the superconducting magnetic separation slurry concentration is 20%, and the superconducting magnetic separation magnetic field strength is 5.0 T; finally, a high-molybdenum-low-copper concentrate with a Mo grade of 2.75% and a Cu grade of 16.22% was obtained, and the molybdenum and copper recoveries were 82.42% and 22.33% respectively; a high-copper-low-molybdenum concentrate with a Cu grade of 20.58%, a Mo grade of 0.11%, and copper and molybdenum recoveries were 64.10% and 7.46% respectively; a kaolin concentrate with a yield of 14.86%, an Al2O3 grade of 29.11%, a Fe2O3 grade of 0.15%, and a whiteness of 82 was obtained.

[0024] Table 1 Flotation reagent dosage of Examples 1 to 4 (g / ton·Ore) Comparative Example 1 The ore sample used in this example is the same as that in Example 1. The specific copper-molybdenum beneficiation process is the same as that in Example 1, except that the high entropy dispersant used in steps S2 and S3 is replaced by an equal amount of carboxymethyl cellulose, and the high gradient magnetic separator used in S4 replaces the superconducting magnetic separation, with a magnetic field strength of 1.0 T. Finally, an iso-floatable concentrate with a Mo grade of 2.41% and a Cu grade of 15.15% is obtained, with molybdenum and copper recoveries of 80.59% and 25.29%, respectively. The enhanced copper concentrate has a Cu grade of 16.26%, a Mo grade of 0.12%, and copper and molybdenum recoveries of 61.90% and 9.15%, respectively. The kaolin concentrate yield is 16.24%, the Al2O3 grade is 26.21%, the Fe2O3 grade is 0.51%, and the brightness is 55.

[0025] The macroscopic morphology of flotation tailings slurry sedimentation under different dispersant dosages in Example 1, Example 2, Example 3 and Comparative Example 1 is as follows: Figure 2 shown.

[0026] Comparative Example 2 The ore sample used in this example is the same as that in Example 1. The specific copper-molybdenum beneficiation process is the same as that in Example 1, except that the high entropy dispersant used in steps S2 and S3 is replaced by an equal amount of carboxymethyl cellulose, the collector used in S2 is replaced by an equal amount of ethionamide and diesel (mass ratio is 1:1), and the high gradient magnetic separator used in S4 replaces the superconducting magnetic separation, with a magnetic field strength of 1.0 T; the final floatable concentrate has a Mo grade of 2.12%, a Cu grade of 14.30%, and molybdenum and copper recoveries of 80.94% and 26.75%, respectively; the enhanced copper concentrate has a Cu grade of 15.30%, a Mo grade of 0.11%, and copper and molybdenum recoveries of 59.28% and 8.70%, respectively; the kaolin concentrate yield is 16.88%, the Al2O3 grade is 25.33%, the Fe2O3 grade is 0.53%, and the brightness is 54.

[0027] Comparative Example 3 The ore sample used in this example is the same as that in Example 1. The specific copper-molybdenum beneficiation process is the same as that in Example 1, except that the high entropy dispersant used in steps S2 and S3 is replaced by an equal amount of carboxymethyl cellulose, the collector used in S2 is replaced by an equal amount of ethionamide and diesel (mass ratio is 1:1), the collector used in S3 is replaced by an equal amount of butyl xanthate, and the high gradient magnetic separator used in S4 replaces the superconducting magnetic separation, and the magnetic field strength is 1.2 T; finally, an iso-floatable concentrate with a Mo grade of 2.26%, a Cu grade of 14.02%, and molybdenum and copper recoveries of 82.56% and 25.62%, respectively, and a fortified copper concentrate with a Cu grade of 14.95%, a Mo grade of 0.10%, and copper and molybdenum recoveries of 62.75% and 8.39%, respectively, is obtained; the kaolin concentrate yield is 14.15%, the Al2O3 grade is 25.61%, the Fe2O3 grade is 0.45%, and the brightness is 57.

[0028] By comparison, it can be seen that the selective adsorption of high-entropy dispersants on the surface of muddy gangue minerals is better than that of carboxymethyl cellulose. Combined with efficient collectors, efficient recovery of copper-molybdenum minerals is achieved, which also lays a good foundation for the subsequent efficient separation of copper and molybdenum. At the same time, superconducting magnetic separation technology shows a significantly better impurity removal and quality improvement effect than conventional magnetic separation, which is conducive to the comprehensive utilization of tailings.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A low-alkali and low-calcium comprehensive utilization method for high-clay copper-molybdenum sulfide ore, characterized in that: The specific steps are as follows: S1 Grinding and Slurry Adjustment: Add 500~700g / t of the adjusting agent into the ball mill, grind the ore, control the grinding fineness of the first stage -0.074mm to account for 60~65%, and adjust the pH value of the ore pulp to 9.50~10.0; S2 copper, molybdenum and other flotation: add the raw ore pulp obtained in S1 to the flotation machine, and add 200-300 g / ton of high entropy dispersant, 30-50 g / ton of collector and 15-25 g / ton of frother in sequence to carry out the copper, molybdenum and other flotation roughing operation; the copper, molybdenum and other flotation roughing foam is subjected to a first equal floatation blank selection operation to obtain high-molybdenum and low-copper concentrate, and the equal floatation selection tailings and copper, molybdenum and other flotation roughing tailings are combined to form equal floatation tailings; S3 copper-molybdenum enhanced flotation: add 300-500g / t of adjusting agent to the floatable tailings obtained in S2, adjust the pH value of the pulp to 10.80-11.30, and then add 100-300g / ton of high entropy dispersant, 50-80g / ton of collector and 20-30g / ton of frother to carry out an enhanced copper roughing operation to obtain enhanced copper roughing foam and enhanced copper rough tailings. Add 10-15g / ton of collector and 10-15g / ton of frother to the enhanced copper rough tailings for sweeping. The scavenging operation obtains scavenging concentrate and scavenging tailings. The scavenging tailings are copper-molybdenum flotation tailings. 50-100 g / t of inhibitor is added to the enhanced copper roughing foam to carry out the Concentration I operation to obtain Concentration I foam and Concentration I tailings. The Concentration I tailings are mixed with the scavenging concentrate and returned to the enhanced copper roughing operation to form a closed loop. 40-60 g / t of inhibitor is added to the Concentration I foam to carry out the Concentration II operation to obtain high-copper and low-molybdenum concentrate and Concentration II tailings. The Concentration II tailings are returned to the Concentration I operation to form a closed loop. S4 desulfurization and desliming - magnetic separation to recover kaolin: add 300~600g / t of activator to the copper-molybdenum flotation tailings obtained in S3, adjust the pH value of the pulp to 9.50~10.00, and then add 30~60g / ton of butyl xanthate and 20~30g / ton of frother in sequence for flotation desulfurization to obtain sulfur concentrate and desulfurization tailings; the desulfurization tailings are classified by multi-stage cyclone to obtain -0.010mm ore slime, and the yield is controlled at 15~20%; the ore slime is deironed by superconducting magnetic separation to obtain kaolin concentrate and magnetic tailings.

2. The low-alkali and low-calcium comprehensive utilization method of high-clay copper-molybdenum sulfide ore according to claim 1, characterized in that: The adjusting agent described in S1 and S3 is one of sodium hydroxide and calcium oxide or a mixture of the two, and the mass ratio of the mixture of the two is 1:2~1:

3.

3. The low-alkali and low-calcium comprehensive utilization method of high-clay copper-molybdenum sulfide ore according to claim 1, characterized in that: The high entropy dispersant in S2 and S3 is a mixture of polymaleic acid, polyaspartic acid, carboxymethyl cellulose and sodium humate, which is prepared by a solution blending method and modified in an ethanol solution.

4. The low-alkali and low-calcium comprehensive utilization method of high-clay copper-molybdenum sulfide ore according to claim 1, characterized in that: The collector in S2 is a composite collector formed by methyl mercaptobenzoate and diesel, the preparation ratio of which is 1:1 to 4:1, and the foaming agent is MIBC or pine oil.

5. The low-alkali and low-calcium comprehensive utilization method of high-clay copper-molybdenum sulfide ore according to claim 1, characterized in that: The collector in S3 is a composite collector composed of any two of 5-hydroxyoctane-4-one oxime, thiazolidinedione, and Y89 xanthate, and the preparation ratio is 1:1 or 1:2; the inhibitor is a composite inhibitor composed of water glass and carboxymethyl cellulose, and the preparation ratio is 1:1~5:

1.

6. The low-alkali and low-calcium comprehensive utilization method of high-clay copper-molybdenum sulfide ore according to claim 1, characterized in that: The activating agent for the flotation desulfurization operation in S4 is oxalic acid or sulfuric acid, and the foaming agent is MIBC or pine oil.

7. The low-alkali and low-calcium comprehensive utilization method of high-clay copper-molybdenum sulfide ore according to claim 1, characterized in that: In the superconducting magnetic separation operation described in S4, the slurry concentration is 15~20% and the magnetic field strength is 3.0~5.0T.

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